External Morphology of Thrips by M.Salman


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Complete external morphological character of Thrips. order Thysanoptera
family: Thripidae

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External Morphology of Thrips by M.Salman

  1. 1. Muhammad Salman 34-E
  2. 2.  Order: Thysanoptera.  Family: Thripidae  Thrips are tiny, slender yellowish brown insects with fringed wings.  Hemimetabolous insects.
  3. 3.  Head Antennae Mouthparts Eyes  Thorax Wings Legs  Abdomen Aedeagus Ovipositor Setae Spiracles
  4. 4. Thrips External Morphology
  5. 5.  Antennae relatively short, 4- to 9-segmented.  Bead-like (moniliform) or filiform (in some )  The families of thrips are separated largely by the characters of the antennae, particularly the number of antennal segments and the nature of the sensoria on the third and fourth segments.
  6. 6. Moniliform
  7. 7. Filiform
  8. 8. Rasping-Sucking Mouthparts Thrips have asymmetrical mouthparts that are also unique to the group.  The right mandible of thrips is reduced and vestigial and in some species completely absent.  The left mandible is larger, and forms a narrow stylet used to pierce the cell wall of tissues.  Some species may then inject digestive enzymes as the maxillary stylets and hypopharynx are inserted into the opening to drain cellular fluids.  
  9. 9.  This process leaves a distinctive silvery or bronze scarring on the surfaces of the stems or leaves where the thrips feed.
  10. 10.  Thrips has Compound Eyes.
  11. 11. Compound Eyes
  12. 12. Thrips External Morphology
  13. 13.    Two Pairs Strippy type. The wings are modified into strips or rod-like structures & fringed with long hair.  Strap-like two pairs of wings nearly equal, and are very thin with little venation and a lot of hairs making a fringe around the edge, which is why they were named Thysanoptera.
  14. 14.  All Three pairs are Ambulatory or Walking legs.  Tarsi 1-2-segmented, with 1-2 claws and are bladder-like at the end.
  15. 15. All pairs are Abmbulatory or walking legs
  16. 16. Thrips External Morphology
  17. 17.  The abdomen is elongated and generally flattened dorso-ventrally, especially in the Tubulifera (Suborder).  There are 10 distinctive segments with a rudiment of the 11th.
  18. 18.  The male genital organs are composed of paired appendages and an unpaired copulatory organ (aedeagus), all of which retract into the abdomen.  The paired testes and accessory glands with their ducts occur in the posterior half of the abdomen.
  19. 19. Male Thrips Aedeagus
  20. 20. Aedeagus
  21. 21.  The female usually has an ovipositor composed of two pairs of sawlike blades.  There are eight egg sacs (ovarioles) and spherical, often pigmented, seminal receptacle for storage of sperm acquired during mating.
  22. 22. Ovipositor
  23. 23. Ovipositor
  24. 24.  Often in the Tubulifera, several setae on the back are S-shaped and hook into the wing fringes to hold the wings at rest. Setae
  25. 25.  The first and eighth abdominal segments of Thrips bear breathing holes called Spiracles.
  26. 26.       Lewis Judson Stannard. Jr, Thrips, 2013, http://www.britannica.com/EBchecked/topic/594043/thrips/3 9621/The-adult Anonymous, Thysanoptera Thrips, 2013, http://www.discoverlife.org/mp/20q?search=Thysanoptera Drees & Jackman, Order Thysanoptera – Thrips, 2013, http://bugguide.net/node/view/7754 Anonymous, Thrips, 2013, http://en.wikipedia.org/wiki/Thrips#Characteristics John R. Meyer, Thysanoptera Thrips, 2013, http://www.cals.ncsu.edu/course/ent425/library/compendiu m/thysanoptera.html Dr. Alton Stormy Sparks. Jr, Thrips, 2013, http://www.ent.uga.edu/veg/solanaceous/thrips.htm
  27. 27. Thanks for bearing me..!